Draft-gearing.



PATENTED DEC. 11, 1906.

8. P. BUSH.

DRAFT GEARING.

APPLICATION FILED APB..17,1906.

2 SHEETB-SHBET 1.

Allorney {NVENTOR THE NORRIS PETER: ca, wAsNmn vN. n. c.

PATENTED DEC. 11 1906.

2 QHEBTS -BHEET 2 Ml H mm S. P. BUSH. DRAFT GEAEING. APPLIGATION FILED APE.17, 1906.

WITNESSES W v SAMUEL P. BUSH, OF COLUMBUS, OHIO.

DRAFT-GEARING.

Specification of Letters Patent.

Patented Dec. 11, 1906.

Application filed April 17,1906. Serial No. 312,177.

To CLZZ whom it may concern:

Be it known that I, SAMUEL P. BUSH, a resident of Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Draft- Gearing; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. 1

My invention relates to improvements in draft-gearing, the object of the invention being to provide a strong durable structure; and it consists of a draft attachment used with and applied to the rear end of the drawbar, surrounding and sustaining a resisting draft mediumsuch as springs, frictionpieces, &c.all of which is attached to the end and lower body portion of cars.

The introduction and use of large locomotives, large cars, and long trains has made it necessary to gradually increase the strength and efficiency of draftgears for railway purposes, and in so doing many disadvantages have developed in connection with existing draft appliances, among which are the great length of the draft attachment or yoke, the getting loose and breaking of some of the parts of the draft-yoke, which is built up usually out of several pieces, and the inefficient fastening of the yoke to the draw-bar, the present means in general use consisting of rivets which are insuliicient in strength and frequently shear off and more often become loose and is not satisfactory because it has no flexibility and is not a convenient means of applying at car-repair points to the draw-bar.

My invention has certain improvements in this draft attachment, such as reducing its length, simplifying and reducing the number of parts, providing a more eflicient and convenient means of applying the yoke to the rear end of the draw-bar, and of getting the utmost strength, together with a minimum of weight, thus economizing in every direction. I prefer to make this yoke, with its enlargements or bosses, stops, and tie-bars, integral in one piece by casting; but it is not essential that it should be entirely so. It might be forged or otherwise put together, so as to become largely integral and still be very efficient, and I describe below more than one means of construction for the same device.

In the accompanying drawings, Figure 1 is a side elevation illustrating my improvements. Fig. 2 is a plan view; and Figs. 3, 4, 5, 6, and 7 are views of details of construction.

1 represents a yoke the ends of which are provided on their inner faces with enlargements or bosses 2-, integral with the yoke, and at intermediate portions of the yoke at top and bottom integral flanges or follower-stops 3 are provided.

In order to secure the upper and lower members of the yoke together, sometimes necessary, I have provided a connecting bar or web l between them and hereinafter referred to as a "tie-bar. This tie-bar is shown applied to the central portion, but may be otherwise located, and more than one bar may be employed as desired, :its function being to retain the upper and lower members of the yoke in their proper relative positions, and this tie-bar or tie-bars, while not necessarily so, is preferably integral with the yoke members. It may consist simply of a bolt or rivet applied as a separate piece and would serve the samepurpose and not in any Way effect the operation ofthe device; but in general practice it is better to reduce the number of separate'parts. This inter: mediate connection of stop and tie usually consists of a block fitting between the two members and one or more bolts or rivets passing through the members and the block, the bolts performing the function of securing the block in position-and of securing the two members together; but in this construction the bolts or rivets actually become both the stops and tie-bars and the block is more of a filler, and this construction requires a greater total length of yoke, which is a disadvantage. I therefore prefer to use the construction shown, as it reduces the length to a minimum. If the stops were applied as shown and the members secured together with bolts or rivets in the same cross plane, then the length would be reduced to a minimum; but the number of parts would be increased. The enlargements 2 are intended yoke might be first spread apart and the enlargements brought opposite the recesses and then pulled together by means of the bolt 7, or a box-washer or fillingpieces, (shown at 8 in Figs. 3, 4, 6, and 7,) having a circular opening in the center adapted to fit around the bosses or enlargements, having its outer dimensions angular or rectangular and adapted to fit into the corresponding recesses in the draw-bar, may be used. In this way having once" applied the washers to the enlargements the yoke could be attached to the draw-bar, as described in the first instance, but having applied the yoke in either way a bolt or pin 7 secures the ends of the yoke in position with relation to the bar andin the case of the center b'osses becomes a center to which the yoke may pivot.

In the drawings I have shown that type of draft-gear known as the double or duplex tandem arrangement. The followers 8 9 are disposed opposite each other in one compartment of the yoke, and 10 11 are disposed opposite each other in the other compartmerit of the yoke. These followers are retained in position by the yoke by draftpieces attached to the car-body. Between these opposingfollowers is the resisting medium of the draft-gear, such as springs, fricnonieces, 860'. By making these followers of the bo'X' for'rn shown I am able to reduce the total length of the yoke materially, as the plain followers for the same strength must necessarily be much thicker. The depth of the u per and lower flanges at 12 is such that the compression or movement of the draft medium can be limited so as to prevent the latter, such as springs, from being compressed solid, and thereby avoid injury to said medium.

A great many slight changes might be made in the general form and arrangement of the parts described without departing from my invention, and hence I do not restrict myself to the precise details set forth, but consider myself at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of my invention.

Having'fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination with a coupling-shank and a yoke, of washers carried by one of said parts, and bosses constituting connections between said washers and the other of said parts.

2. The combination of a couplingshank, a yoke, one of said parts'having'bosses, and washers connecting said.v bosses with the other of said parts.

3. The combination of a coupling-shank, a yoke, one of said parts having bosses, and washers interposed between said bosses and the other of said parts.

4. A draft-yoke provided on the inner faces of its parallel members with followerstops, and a tiebar ntegral at its respective ends with the inner ends of the followerstops.

5. A draft attachment comprising a yoke, circular enlargements or bosses thereon, and box-washers on the enlargements.

6. In a draft attachment the combination of a yoke having circular enlargements, boxwashers adapted to envelop the enlargements and recesses or sockets in the draw-bar to receive the box-washers and enlargements.

7. In a draft attachment, the combination with a yoke, of cupped followers therein for the accommodation of limiting means, two diametrically opposite portions of the wall of each follower projecting farther from the base of the follower than the other portions of said wall.-

8. In a draft attachment, the combination with a yoke, of cupped followers therein for the accommodation of limiting means, two diametrically opposite portions of the wall of each follower having curved edges projecting farther from the base of the follower than the other portions of said wall.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

' SAMUEL P. BUSH. Witnesses:

GEo. G. MERRING, F. G. BENNETT. 

